PMID- 30739166
OWN - NLM
STAT- MEDLINE
DCOM- 20190718
LR  - 20200225
IS  - 1439-6327 (Electronic)
IS  - 1439-6319 (Linking)
VI  - 119
IP  - 4
DP  - 2019 Apr
TI  - Carbohydrate consumption and variable-intensity exercise responses in boys and 
      men.
PG  - 1019-1027
LID - 10.1007/s00421-019-04091-z [doi]
AB  - PURPOSE: The effect of carbohydrate (CHO) supplementation on physiological and 
      perceptual responses to steady-state exercise has been studied in children. 
      However, little is known about these responses to variable-intensity exercise 
      (VIE) and how these responses might differ from adults. This study examined the 
      physiological and perceptual effects of CHO on VIE in boys and men. METHODS: 
      Eight boys (11.1 +/- 0.9 years) and 11 men (23.8 +/- 2.1 years) consumed CHO or a 
      placebo (PL) beverage before and throughout VIE (three 12-min cycling bouts with 
      intensity varying every 20-30 s between 25, 50, 75, and 125% peak work rate). 
      Pulmonary gas exchange was assessed during the second 12-min bout. RPE was 
      assessed twice per bout. RESULTS: In CHO, blood glucose increased and then 
      decreased more from pre-exercise to 12 min and was higher in this trial at the 
      end of exercise in men versus boys. In boys, blood glucose in CHO was higher at 
      24 and 36 min of exercise than in PL. RER during the CHO trial was higher in both 
      groups; the other physiological responses were unaffected by CHO. All RPE 
      measures (whole body, legs and chest) increased over time, but were not different 
      between groups or trials. CONCLUSION: Blood glucose patterns during VIE were 
      differentially affected by CHO in boys and men, but most physiological and 
      perceptual responses to VIE were unaffected by CHO in either group. Knowledge of 
      the underlying mechanisms of glucose regulation and effects on physical 
      performance during this type of exercise in children is warranted.
FAU - Guth, Lisa M
AU  - Guth LM
AD  - Human Performance Laboratory, Ball State University, Muncie, IN, 47306, USA.
FAU - Rogowski, Michael P
AU  - Rogowski MP
AD  - Human Performance Laboratory, Ball State University, Muncie, IN, 47306, USA.
FAU - Guilkey, Justin P
AU  - Guilkey JP
AD  - Human Performance Laboratory, Ball State University, Muncie, IN, 47306, USA.
AD  - Department of Kinesiology, Coastal Carolina University, Conway, SC, 29528-6054, 
      USA.
FAU - Mahon, Anthony D
AU  - Mahon AD
AUID- ORCID: 0000-0002-3088-7322
AD  - Human Performance Laboratory, Ball State University, Muncie, IN, 47306, USA. 
      tmahon@bsu.edu.
LA  - eng
PT  - Journal Article
DEP - 20190209
PL  - Germany
TA  - Eur J Appl Physiol
JT  - European journal of applied physiology
JID - 100954790
RN  - 0 (Blood Glucose)
RN  - 0 (Dietary Carbohydrates)
SB  - IM
MH  - Adolescent
MH  - Adult
MH  - Bicycling/physiology
MH  - Blood Glucose/metabolism
MH  - Child
MH  - Diet
MH  - Dietary Carbohydrates/*metabolism
MH  - Exercise/*physiology
MH  - Heart Rate/*physiology
MH  - Humans
MH  - Male
MH  - Oxygen Consumption/*physiology
MH  - Pulmonary Gas Exchange/*physiology
MH  - Young Adult
OTO - NOTNLM
OT  - Blood glucose
OT  - Child-adult difference
OT  - Cycle ergometry
OT  - Metabolism
EDAT- 2019/02/11 06:00
MHDA- 2019/07/19 06:00
CRDT- 2019/02/11 06:00
PHST- 2018/06/20 00:00 [received]
PHST- 2019/01/31 00:00 [accepted]
PHST- 2019/02/11 06:00 [pubmed]
PHST- 2019/07/19 06:00 [medline]
PHST- 2019/02/11 06:00 [entrez]
AID - 10.1007/s00421-019-04091-z [pii]
AID - 10.1007/s00421-019-04091-z [doi]
PST - ppublish
SO  - Eur J Appl Physiol. 2019 Apr;119(4):1019-1027. doi: 10.1007/s00421-019-04091-z. 
      Epub 2019 Feb 9.